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Acid-Base Equilibrium
Atomic Structure And Related Patterns In The Periodic Table
Bonding And Structure, And Intermolecular Forces
Chemical Equilibrium
D-Block Elements (Transition Elements)
DESCRIPTIVE INORGANIC CHEMISTRY: Group IV (14)
DESCRIPTIVE INORGANIC CHEMISTRY: Halogens (GROUP VII or 17)
DESCRIPTIVE INORGANIC CHEMISTRY: Modern Periodic Table, Periodicity And S-Block Elements
Functional Group Chemistry And Reaction Mechanism
ORGANIC CHEMISTRY: Fundamentals
Raoult’s Law And Phase Equilibria
Reaction Kinetics
Redox Equilibrium
The Mole Concept

The radioactive isotope of Thorium ₉₀²³²Th decays by a series of radioactive disintegrations to give ₈₂²⁰⁸Pb.

The number of radioactive disintegrations can best be represented by:

6 alpha emissions and 4 beta emissions

6 beta emissions and 2 alpha emissions

8 alpha emissions.

8 alpha emissions and 2 beta emissions

What happens to the mass number and the atomic number of an element when it emits alpha radiation?

The mass number increases by four and the atomic number increases by two.

The mass number decreases by four and the atomic number decreases by two.

The mass number remains unchanged while the atomic number decreases by one.

The mass number remains unchanged while the atomic number increases by one.

Different isotopes of a particular element contain the same number of:

protons and neutrons

Protons

Neutrons

subatomic particles

Of the following transitions in the Bohr hydrogen atom, the ... transition results in the emission of the highest-energy photon.

n = 3 to n = 6

n = 6 to n = 3

n = 6 to n = 1

n = 1 to n = 6

What is the right chemical symbol of X in the nuclear reaction:

₁₃²⁷Al + ₀¹n → X + ₂⁴He